Year	% of GDP
1960	20.865725373794874
1961	21.47638935586415
1962	23.172395427041288
1963	23.898718512323132
1964	24.97435714729789
1965	27.495772626378653
1966	28.597313723269874
1967	31.031606909947108
1968	31.996747607316752
1969	32.51035815414449
1970	32.32767900910421
1971	31.501415854419548
1972	32.01832277527995
1973	30.57552836888281
1974	22.68623907293627
1975	27.096433666794603
1976	28.51823996054445
1977	31.250769313618278
1978	36.112019596433036
1979	34.51026075123108
1980	33.51776653563158
1981	38.65395586610141
1982	44.59870894791983
1983	49.87881682258113
1986	61.9839965441299
1987	62.365575921521184
1988	64.72003535442049
1989	61.67450932860121
1990	54.15176552909363
1991	54.96528094612405
1992	54.482122723981256
1993	54.62132499895939
1994	55.165531949141325
1995	54.039431737447416
1996	52.595824703448734
1997	53.986611938056804
1998	59.12977583344813
1999	58.49702227558106
2000	56.18434684978278
2001	61.9076644980613
2002	64.29307625947118
2003	63.147501840426116
2004	60.09368820602586
2005	57.91107739884842
2006	58.76472221007614
2007	60.14610975775304
2008	57.85020191011809
2009	70.27632745150093
2010	65.67769156614015
2011	60.505308706335825
2012	60.84315898554294
2013	64.65059958742751
2014	70.21467160779362
2015	80.95889819818589
2016	85.59012541143542
2017	83.43952603680134